During my increasingly epic clear-out, I’ve come across lots of old electronics boxes like this one, because I inexplicably have the habit of keeping such boxes “just in case”.
I was going to recycle them as cardboard, until I realised that I could turn them inside out and use them as storage units for small objects like USB cables and mains adaptors.
Open the box:
Notice that the sides are folded over — that’s why their insides are not plan like the rest of the inside. Pop the tabs at the bottom out of their slots, and the whole box opens flat:
Turn it over:
Fold the front and back up to vertical. Then you can fold one of the sides back over itself and set its tabs back into the slots:
And do the same with the other side:
Then you can close the box:
And slide the retaining tabs at the front into the side gaps.
This particular box is now in play as the repository for all my USB cables:
I’ve done this with half a dozen old hardware boxes. Much more satisfying that just throwing them away.